Math Homework

Ask Math Questions. Get Help With Your Math Homework

Connect one-on-one with {0} who will answer your question

1. Consider a population with...

1. Consider a population with µ= 77.6 and s = 5.63.

(A) Calculate the z-score for x ¯ = 76.1 from a sample of size 52.

(B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B of the text? Why or why not?

2. Given a level of confidence of 99% and a population standard deviation of 10, answer the following:

(A) What other information is necessary to find the sample size (n)?

(B) Find the Maximum Error of Estimate (E) if n = 77. Show all work.

3. A sample of 75 golfers showed that their average score on a particular golf course was 91.32 with a standard deviation of 6.85.

Answer each of the following (show all work

and state the final answer to at least two decimal places.):

(A) Find the 95% confidence interval of the mean score for all 75 golfers.

(B) Find the 95% confidence interval of the mean score for all golfers if this is a sample of 120 golfers instead of a sample of 75.

(C) Which confidence interval is larger and why?

4. Assume that the population of heights of female college students is approximately normally distributed with mean µ of 66.24 inches and standard deviation s of 5.07 inches. A random sample of 72 heights is obtained. Show all work.

(A) Find the mean and standard error of the x ¯ distribution

(B) Find P(x ¯ > 65.75)

5. The diameters of apples in a certain orchard are normally distributed with a mean of 4.45 inches and a standard deviation of 0.42 inches. Show all work.

(A) What percentage of the apples in this orchard is larger than 4.38 inches?

(B) A random sample of 100 apples is gathered and the mean diameter is calculated. What is the probability that the sample mean is greater than 4.38 inches?

6. A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 98% confident that her estimate is correct. If the standard deviation is 5.17, how large a sample is needed to get the desired information to be accurate within 0.62 decibels? Show all work.

(A) Calculate the z-score for x ¯ = 76.1 from a sample of size 52.

(B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B of the text? Why or why not?

2. Given a level of confidence of 99% and a population standard deviation of 10, answer the following:

(A) What other information is necessary to find the sample size (n)?

(B) Find the Maximum Error of Estimate (E) if n = 77. Show all work.

3. A sample of 75 golfers showed that their average score on a particular golf course was 91.32 with a standard deviation of 6.85.

Answer each of the following (show all work

and state the final answer to at least two decimal places.):

(A) Find the 95% confidence interval of the mean score for all 75 golfers.

(B) Find the 95% confidence interval of the mean score for all golfers if this is a sample of 120 golfers instead of a sample of 75.

(C) Which confidence interval is larger and why?

4. Assume that the population of heights of female college students is approximately normally distributed with mean µ of 66.24 inches and standard deviation s of 5.07 inches. A random sample of 72 heights is obtained. Show all work.

(A) Find the mean and standard error of the x ¯ distribution

(B) Find P(x ¯ > 65.75)

5. The diameters of apples in a certain orchard are normally distributed with a mean of 4.45 inches and a standard deviation of 0.42 inches. Show all work.

(A) What percentage of the apples in this orchard is larger than 4.38 inches?

(B) A random sample of 100 apples is gathered and the mean diameter is calculated. What is the probability that the sample mean is greater than 4.38 inches?

6. A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 98% confident that her estimate is correct. If the standard deviation is 5.17, how large a sample is needed to get the desired information to be accurate within 0.62 decibels? Show all work.

Show More

Show Less

Was this answer helpful?

Describe your issueThe assistant will guide you

Chat 1:1 with a math tutor or teacherLicensed Experts are available 24/7

100% satisfaction guaranteeGet all the answers you need

Related Math Homework Questions

1. Consider a population with u=74.5 and Q=3.04 . (A) Calculate

1. Consider a population with u=74.5 and Q=3.04 . (A) Calculate the z-score for x=75.7 from a sample of size 18. (B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B… read more

1. Consider a population with μ =53.1 and σ=4.43. (A) Calculate

1. Consider a population with μ =53.1 and σ=4.43. (A) Calculate the z-score for x=49.8 from a sample of size 11. (B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B… read more

1. In the formula for the Confidence Interval for the Mean,

1. In the formula for the Confidence Interval for the Mean, what symbol(s) represents the Maximum Error of Estimate? 2. If a population has a standard deviation σ of 18.2 units, what is the standard e… read more

Please show all work Bonus of $20.00 will be given 1. Consider

Please show all work: Bonus of $20.00 will be given 1. Consider a population with µ=65.7 and σ=5.52 . (A) Calculate the z-score for xbar = 63.1 from a sample of size . Why or why not? 2. Given a level… read more

Please show all work Bonus will be given 1. Consider a population

Please show all work: Bonus will be given 1. Consider a population with µ=65.7 and σ=5.52 . (A) Calculate the z-score for xbar = 63.1 from a sample of size 13. (B) Could this z-score be used in calcul… read more

1) A sample of 135 golfers showed that their average score

1) A sample of 135 golfers showed that their average score on a particular golf course was 85.83 with a standard deviation of 4.96. Answer each of the following (show all work and state the final answ… read more

1. Consider a population with 6.71 and 5.76. (A) Calculate

1. Consider a population with µ=6.71 and s=5.76. (A) Calculate the z-score for xbar=65.7from a sample of size 40. (B) Could this z-score be used in calculating probabilities using Table 3 in Appendix … read more

1. A sample of 147 golfers showed that their average score

1. A sample of 147 golfers showed that their average score on a particular golf course was 91.85 with a standard deviation of 3.29. Answer each of the following (show all work and state the final answ… read more

3. A sample of 93 golfers showed that their average score on

3. A sample of 93 golfers showed that their average score on a particular golf course was 89.33 with a standard deviation of 6.43. Answer each of the following (show all work and state the final answe… read more

1. Given a level of confidence of 95% and a population standard

1. Given a level of confidence of 95% and a population standard deviation of 8, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of… read more

1.Consider a population with a mean 99.4 and standard deviation

3. A sample of 83 golfers showed that their average score on a particular golf course was 84.81 with a standard deviation of 5.99. Answer each of the following (show all work) and state the final answ… read more

1.Consider a population with a mean 99.4 and standard deviation

1.Consider a population with a mean= 99.4 and standard deviation= 5.55. (A)Calculate the z-score for /x= 97.3 from a sample of size 38. Use the formula z = (xbar – miu) / (std dev / sqrt n) (B) Could … read more

1. Consider a population with a mean of 93.3 and a standard

1. Consider a population with a mean of 93.3 and a standard deviation of 5.27. (A) Calculate the z-score for x¯ = 94.9 from a sample of size 12. (B) Could this z-score be used in calculating probabili… read more

Just need to check 2 - 6, thanks in advance 2. Given a level

Just need to check 2 - 6, thanks in advance 2. Given a level of confidence of 95% and a population standard deviation of 13, answer the following: (A) What other information is necessary to find the s… read more

10. A set of 50 data values has a mean of 30 and a variance

10. A set of 50 data values has a mean of 30 and a variance of 4. I. Find the standard score (z) for a data value = 26. II. Find the probability of a data value < 26. III. Find the probability of a… read more

Osbert 13. A sample of 82 golfers showed that their average

Osbert 13. A sample of 82 golfers showed that their average score on a particular golf course was 81.93 with a standard deviation of 3.87. Answer each of the following (show all work and state the fin… read more

. The diameters of grapefruits in a certain orchard are normally

Given a level of confidence of 95% and a population standard deviation of 7, answer the following: (A) What other information is necessary to find the sample size (n)? (B) Find the Maximum Error of Es… read more

$15 for whoever wants to do these problems 1. Consider a

$15 for whoever wants to do these problems 1. Consider a population with mu=59.6 and standard deviation of 3.45 (A) Calculate the z-score for xbar= 60.7 from a sample of size 15. (B) Could this z-scor… read more

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.

JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.

Web sites like justanswer.com/legal

...leave nothing to chance.

...leave nothing to chance.

Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.

Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

Los Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

Hesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

Kernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

Woodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

Elkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

Dallas, TX

< Previous | Next >

rajeevanpillai

Master's Degree

1,048 satisfied customers

M.Sc Statistics MPhil Statistics

Manal Elkhoshkhany

Bachelor's Degree

239 satisfied customers

I have completed my BA degree in 1988, and graduated with a GPA of 4.0.

Jabi

Tutor

155 satisfied customers

I've been an Expert on JustAnswer since July 2010

Mr. Gregory White

Master's Degree

113 satisfied customers

M.A., M.S. Education / Educational Administration

Dr Arthur Rubin

Doctoral Degree

76 satisfied customers

Ph.D. in Mathematics, California Institute of Technology

JACUSTOMER-yrynbdjl-

Master's Degree

49 satisfied customers

I have taught college Mathematics for the past 10 years.

SusanAthena

Master's Degree

41 satisfied customers

Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.

< Previous | Next >

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.